Grain-scourer



(No Model.) 2 Sheets-Sheet 1. P. PROVOST.

GRAIN SGOURER.

No. 489,555. Patented Oct. 28, 1890.

(No Model.) 2 Sheets-Sheet 2.

P. PROVOST. GRAIN SOOURBR.

No. 439,555. Patented O0t.28,1890.

INVENTOH W/TNESSES. By

M A TTOHNEYS UNITED STATES PATENT OFFICE.

PETER PROVOST, OF MINNEAPOLIS, MINNESOTA.

GRAlN-SCOURER.

SPECIFICATION forming part of Letters Patent No. 439,555, dated October 28, 1890.

Application filed June 5, 1890- To all whom it may concern.-

Be it known that I, PETER PROVOST, of Minneapolis, in the county of Hennepin and State of Minnesota, have invented a new and Improved Graiu-Scourer, of which the following is a full, clear, and exact description.

The invention relates to grain-scourers such as shown and described in the Letters Patent No. 398,538, granted to me February 26, 1889.

The object of the present invention is to provide a new and improved grain-scourer which is simple and durable in construction and very effective in operation.

The invention consists in certain parts and details and combinations of the same, as will be described hereinafter, and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similarlett-ers of reference indicate corresponding parts in all the figures.

Figure l is a sectional side elevation of the improvement. Fig. 2 is asectional plan view of the same on the line m :c of Fig. 1, and Fig. 3 is a similar View of the same on the line 3 y of Fig. 1.

The improved grain-scourer is provided with a stationary cylinder A, into the upper end of which opens an inlet-pipe B for charging the cylinder with the grain to be cleaned. In the cylinder is mounted centrally the vertical shaft 0, carrying near its lower end a pulley D, over which passes the belt E, extending through suit-able openings in the cylinder A and connected with machinery for imparting a rotary motion to the said shaft 0. On the latter, near its upper end, is arranged an agitator F, operating on the top surface of a hopper-shaped wire screen G, onto which discharges the inlet-pipe B.

Below the screen G is formed a chamber H, having an inclined bottom I, and having its outer wall formed by part of the cylinder A. The dust passing through the wire screen G passes into the chamber II onto the bottom I, and from the latter slides downward and passes through openings J to the outside of the cylinder A.

On the lower end of the hopper-shaped wire screen G is formed a short cylinder K, concentric with the shaft C and opening onto a disk L, covered with wire-netting and se- Serial No, 354,341. (No model.)

cured on the said shaft C. Above the disk L and between the cylinder K and the cylinder A is arranged a fixed wire screen N, as is plainly shown in Fig. 1. The disk Lis somewhat smaller in diameter than the interior diameter of the cylinder A, so that the grain, after leaving the disk L, falls onto a hoppershaped wire screen G and is agitated by ribs L, attached to the cone-shaped lower surface of the revolving disk L. The dust passes through G into a chamber H, having an inclined bottom 1, similar to the chamber H and the bottom I above described. The grain, passing down theinclined screen G, comes in contact with the ribs L of the revolving disk L, so that the grain is repeatedly turned over before it leaves the screen G to pass into cylinder K.

Outlet-openings J in the cylinder A lead from the chamber H and carry the dust to the outside. A cylinder K extends from the lower end of the wire screen G and opens onto a revolving brush 0, consisting of a series of arms provided with bristles projecting from their upper and lower faces and secured 011 the shaft 0. The brush 0 works in a chamber P, having a hopper-shaped screen P and a bottom P provided with an outletpipe P The lower end of this outlet-pipe P is adapted to be opened or closed by a conical valve Q, held on a valve-stem Q and operated from the outside similarly to the valve S shown in the patent above referred to. The outlet-pipe P discharges into the grain-outlet R, held in an inclined position and leading to the outside of the cylinder A. The screen I is similar to the screens G and G and opens into a chamber H having an inclined bottom 1 leading to openings J leading to the outside, so that impurities brushed by the brush 0 from the grain can pass into the said chamber ll and to the outside of the cylinder A by means of said openings J Some of the outlet-openings J and J open into a channel. S, formed on the outside of the cylinder A and extending at its top into a chamber S, formed on the top of the cylinder A. Openings S in the top of the chamber S connect the latter with the chamber T, in which operates a fan-wheel U, secured on the shaft 0. The chamber T is connected by openings V in its top with the cap V, connected by a valve V with a downwardl Y-GX- tending spout W, having two arms W and 7 of which the arm W connects bybranch pipes W and W with the channel S. The arm W is provided on its lower end with a hinged bottom W which remains closed until a large quantity of dust, dirt, and screenings has accumulated in it. Then it is opened and the dust is discharged.

The operation is as follows: When the main shaft 0 is set in motion, the brush 0, the disk L, and the agitator 'F, as well as the fan-wheel U, are revolved. The grain entering the inlet-pipe B falls onto the screen G and is agitated thereon by the arms of the agitator F. The dust arising by the grain being thus agitated passes into the chamber H, and from the latter through the openings J to the outside of the cylinder A. Part of the dust falls into the channel S and is drawn upward in the latter by the action of the fanwheel U into the chamber S, through vthe openings S to the chamber T, and discharged through its side openings. Part of the dust which is not sucked upward in the channel S passes through the branch pipes Vi and W into the arm WV, from the latter into the chute W, and through the valve V into the cap V, and through the openings V to the chamber T by the action of the fan-wheel II. The heavy particles of dust which are not sucked up in the chute IV fall downward into the arm NV, and can be removed from the latter by opening its door The grain, after leaving the screen G, falls through the cylinder K onto the screen-disk L, and from the latter is thrown outward by centrifugal force, so as to fall onto the screen G, which permits the dust to pass into the chambers 11', and from the latter to the outside or into the channel S and arm W, as above described. The grain, after leaving the screen G, passes through the cylinder K onto the revolving brush 0, which brushes the grain so as to remove any particles of dust which may adhere to the kernels. The grain then falls into the chamber I and is moved from the latter through the openin g P over the valve Q into the outlet-pipe R,which discharges the scoured grain on the outside of the cylinder A. A curved arm similar to the arm Pshown in the patent above referred to may be used in the chamber P to push the grain into the outletopening P By arranging the grain-scourer in the manner shown and described the'grain is thoroughly cleaned and all the dust removed before it passes into the chute R.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a grain-scourer, the combination, with an outer casing, of a hopper-shaped screen having a cylindrical projection, a second hopper-shaped screen, a revolving disk in the second screen, and having its upper surface covered with wire-netting, and a screen above the disk and between the outer casing and cylindrical projection, substantially as described.

2. In a grain-scourer, the combination, with an outer casing, of a hopper-shaped screen having a cylindrical projection, a screen between the casing and cylindrical projection, a second hopper-shaped screen, a revolving disk in the second hopper-shaped screen, having its upper surface covered with wire-netting and provided with a cone-shaped lower port-ion, substantially as described.

3. In a grain-scourer, the combination, with ahoppcr-shaped screen having a cylinder projecting from its lower side, of a second hopper-shaped screen below the cylinder, a revolving disk having a cone-shaped lower portion and provided with a wire netting on its upper surface and ribs on its sides, and a screen above the disk and between the cylinder and outer casing, substantially as herein shown and described.

4. A grain-scourer comprising a cylinder, three hopper-shaped screens arranged one above the other in the cylinder, a revolving shaft, beatenarms on the shaft in the upper screen, a disk having a conical lower portion on the shaft in the second screen, and a brush on the shaft in the third or lower screen, substantially as herein shown and described.

5. A grain-scourer comprising a cylinder having openings in its sides, three hoppershaped screens arranged one above the other in the cylinder, chambers with inclined bottoms under the screens, a revolving shaft, a beater on the shaft in the upper screen, a disk having a cone-shaped lower portion on the shaft in the middle screen, and a brush on the shaft in the lower screen, substantially as herein shown and described.

6. In a grain-scourer, the combination, with a cylinder and screens arranged therein, of a chamber above the cylinder, a fan in the chamber, a channel to which the dust is conducted from the cylinder connected with the fan-chamber, a-chamber above the fan-chamher and communicating therewith, a branch discharge-spout leading from the chamber above the fan, and branch pipes leading from the dust-channel to the discharge-spout, substantially as herein shown and described.

PETER PROVOST.

Witnesses:

FRED O. COOK, I. PARKER VEAZEY. 

